Clamp for molding-flasks



(No Model.) Q

R. E. VAN COURT & G. R. MADEIRA.

CLAMP FOR MOLDING FLASKS.

No. 532,847. 7 Patented Jan. 22, 1895 'NITED STAT S ATENT' 'FFIQ EQ-ROBERT E. VAN COURT AND CHARLES R. MADEIRA, OF ELKTON, VIRGINIA.

CLAMP FOR MOLDlNG-FLASKS.

SPECIFICATION forming part of Letters Patent No. 532,847, dated January22, 1895.

Application filed May 10, 1894.

proved locking and clamping device, and

guide for the sections of molding flasks, and it has for its object toprovide a device simple in construction and adapted to withstand therough usage these tools receive.

The invention consists in securing permanently to the sides of thesections of the molding flask guides and locks of peculiar construction,the locking device being adapted to be used as a cam for separating thesec-.

tions after the molding operation is completed, all of which willbehereinafter set forth.

In the drawings:--Figure 1 is a side elevation partly in section,showing the sections locked together; Fig. 2, a similar view showing thelocking-device used as a cam for forcing the sections slightly apart;and Fig. 3 a perspective view of a corner of a molding flask showing thelocking device secured to one side of the corner stay.

Referring to the various parts by numerals, 2 designates the drag orlower section of the flask, and 1 the cope or upper section thereof. Oneach vertical side of the sections of the flask near their ad joiningedges is secured a metal plate 3. The plates 3 of the upper see- I tionof the flask have formed on their lower edges depending lugs at, one ateach end of V the plates, as shown, and the plates secured to the lowersection of the flask have formed on their upper edges pockets orrecesses 5 which register with lugs t of the upper plates and into whichsaid lugs fit. By means of these lugs and pockets it will be readilyseen that the two sections of the flask can be quickly adjusted togetherwithout the least danger of one section sliding on the other, and whenin position they will be fitted together accurately and squarely.

Secured to one of each pair of plates 3, pref- Serial No, 510,790. (Nomodel.)

erably the upper one, is the locking device 6. This locking device ismounted to revolve freely on a pin 7 projecting outwardly from the plate3 near its lower edge, and is substantially S-shaped, being formed withthe two oppositely extending curved hooks or beaks 8. The inner edgesofsaid hooks are formed eccentric to the pivot of the lockingdevice, theinner ends of said edges being nearer the pivot of the device than theouter ends thereof for a purpose which will pres ently appear.

Secured to each of the plates 3, in a position to be engaged by theinner edge of each hook 8, is an. outwardly projecting pin 9. These pinsare so located on the plates 3 that when they are at the inner ends ofthe hooks 8 the two sections of the flasks will be closely drawntogether. The inner edges of the hooks as they are brought intoengagement with the pins act on said pins as cams to force the sectionsof the flask together.

Projecting outwardly from the center of the locking-device andsurrounding the pivot pin 7 is a rectangular enlargement 10, over whichmay be fitted a wrench or other suitable tool to enable the operator tobring the required pressure on the pins 9, through the medium of thecam-edges of hooks 8, to force the sections of the flask together.

In the body of the locking device opposite the point of the hook 8 whichengages the pin on the upper plate 3, is formed a recess The inner wallof this recess is slightly eccentric to the pivot of the device and isso located that when the hooks 8 are disengaged from the pins 9 and thesections of the flask separated, the recess 11 will fit over the pin onthe upper plate and said pin impinging on the inner cam surface thereofwill lock the device in its open position and hold it open againstslight jars. It will thus be seenthat the locking device is always inoperative position.

On the opposite side of the locking-device from the recess 11 is formedthe cam 12. This that it will operate on the lower pin 9 just before theinner end of the recess 11 reaches the pin 9 on the upper plate 3.

In Fig. 3 our device is shown applied to corner stays of aflask.Adifferent form of guide is also shown in this view, but it is manifestthat the guide shown in Figs. 1 and 2 maybe used on this form of device.

From the foregoing it will be readily seen that our device is simple;can be operated quickly and accurately; is always in place on thesections of the flask, and is adapted to withstand the rough usagemolding flasks receive. It will also be seen that by the use of ourdevice the three operations necessary in using molding flasks areaccomplished; as it combines in one device, a guide, a locking andclamping device, and a cam for aiding in separating the sections afterthe molding operation is completed.

If desired the upper pin 9 and hook 8 may be dispensed with, but it isfound desirable to use them in order to relieve the pivot pin 7 of allstrain. The locking device is loosely mounted on the pin 7 to permit thecam edge of the upper hook 8 to engage the pin 9.

Having thus fully described our invention, what we claim is- 1. In amolding flask the combination of two superimposed sections, a pivotedplate carried by one of said sections and formed with an open hook 8 atone end, said hook having an eccentric inner edge, and a cam 12 formedat the other end and on the same side with the hook, and a pin carriedby the other section of the flask and adapted to be engaged by theeccentric edge of the hook and by the cam 12, substantially as describedand for the purpose set forth.

2. A clamp for molding flasks consisting of a loosely pivoted platecarried by one of two superposed sections of a flask, said plate beingformed with the two open hooks 8 having eccentric inner edges, the cam12, and the recess 11 formed with the eccentric inner edge, and the pins9 carried by each section of the flask, substantially as described andfor the purpose set forth.

3. A clamp for molding flasks consisting of the pivoted plate carried byone section of the flask, a hook formed at one end of said plate, saidhook having an eccentric inner edge, an enlargement formed at the pivotof the plate and adapted to receive a wrench, and a pin carried by theother section of the flask and adapted to be engaged by the eccentricedge of hook, substantially as described and for the purpose set forth.

In testimony whereof we affix our signatures in presence of twowitnesses.

ROBERT E. VAN COURT. CHARLES R. MADEIRA. \Vitnesses:

H. T. WORKMAN, W. K. COMPTON.

